Medium effects in supernovae constraints on light mediators

Physical Review D

display=\"inline\"><mi>s</mi></math>-wave scattering phase shifts, low-energy scattering parameters, and binding energies when applicable are extracted using Lüscher's formalism. While the results are consistent with most of the systems being bound at this pion mass, the interactions in the spin-triplet <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mi mathvariant=\"normal\">Σ</mi><mi>N</mi></math> and <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mi mathvariant=\"normal\">Ξ</mi><mi mathvariant=\"normal\">Ξ</mi></math> channels are found to be repulsive and do not support bound states. Using results from previous studies of these systems at a larger pion mass, an extrapolation of the binding energies to the physical point is performed and is compared with available experimental values and phenomenological predictions. The low-energy coefficients in pionless effective field theory (EFT) relevant for two-baryon interactions, including those responsible for <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mi>S</mi><mi>U</mi><mo stretchy=\"false\">(</mo><mn>3</mn><mo stretchy=\"false\">)</mo></math> flavor-symmetry breaking, are constrained. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mi>S</mi><mi>U</mi><mo stretchy=\"false\">(</mo><mn>3</mn><mo stretchy=\"false\">)</mo></math> flavor symmetry is observed to hold approximately at the chosen values of the quark masses, as well as the <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mi>S</mi><mi>U</mi><mo stretchy=\"false\">(</mo><mn>6</mn><mo

Physical Review Letters, 2021